NN
Every 'brand' of English is accepted here, I follow the dictionaries policy in some measure. They spell the two ways, for example, words like analyse/ze, color/colour.
Plus, once in a blue moon I hear the BBC radio4 or watch BBC TV, and in the next blue moon I hear American English by watching CNN, FOX or wathever.
I learned that when it comes to language you can´t be biased, and even in the United States or United Kingdom there are plenty of 'dialects'. So, there´s no way of being choosy about it. Or you can, provided that you are born in some little town and never have any contact with people outside.
But with the invention of sattelite dishes, cars, TV, Internet etc this is getting rarer and rarer these days.

PP.